DNS

How to Install Composer on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Composer on RHEL 9

Composer is the de facto dependency manager for PHP. It resolves and installs PHP library dependencies declared in a project’s composer.json manifest, downloads them from Packagist (the central PHP package repository), generates an optimised autoloader, and manages version constraints with semantic versioning. Composer transformed PHP development by enabling the modern package-based ecosystem — frameworks like […]

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How to Configure Windows Server 2022 for High Availability — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Windows Server 2022 for High Availability

What Is PowerShell Desired State Configuration? PowerShell Desired State Configuration (DSC) is a declarative management platform built into Windows PowerShell and PowerShell 7. Instead of writing imperative scripts that execute a sequence of commands, DSC lets you describe the desired end state of a system — which Windows features should be installed, which services should […]

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Common Problems 116914

Ubuntu 22.04 LTS DNS Resolution Fails with systemd-resolved

🟡 Medium   ⏱ 5–30 min  Last verified: 30 January 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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Common Problems 114630

kdump Fails To Capture Crash Dumps

🟡 Medium   ⏱ 5–30 min  Last verified: 30 January 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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Common Problems 114398

DNF Metadata Download Errors After Adding Extra Repositories

🟡 Medium   ⏱ 5–30 min  Last verified: 30 January 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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Common Problems 112485

Windows Server 2019 — MSIX package install blocked by AppLocker or GPO publisher policy — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 30 January 2023 Affected versions: Windows Server 2019 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution — Primary Fix Solution — Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]

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Common Problems 111807

Windows Server 2022 — Hyper-V checkpoint merge stuck for AVHDX chain — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 30 January 2023 Affected versions: Windows Server 2022 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution — Primary Fix Solution — Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]

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How to Configure Microsoft Deployment Toolkit (MDT) on Windows Server 2022 — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Configure Microsoft Deployment Toolkit (MDT) on Windows Server 2022

What Is Application Request Routing? Application Request Routing (ARR) is a Microsoft IIS extension that turns a Windows Server 2022 machine into a capable HTTP load balancer and reverse proxy. It works in conjunction with the URL Rewrite Module to intercept requests, evaluate server farm configurations, and forward traffic to one or more backend servers. […]

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How to Configure PHP-FPM on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Configure PHP-FPM on Oracle Linux 9

Introduction How to Configure PHP-FPM on Oracle Linux 9 on Oracle Linux 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible […]

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Common Problems 115513

RHEL 7 – systemctl StartLimitHit Keeps Critical App Offline

🟡 Medium   ⏱ 5–30 min  Last verified: 28 January 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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